bates



E. M. BATES, OF EAST ROCHESTER, OHIO, ASSIGNOR 4TO HIMSELF AND J, H. ANDG. W. VSANOR, OF HANOVEHTON, OHIO. 'Lafmpaemlva@essermi/@riz 222,186?.

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'.l'O .ALL WIIOM I'I MAY CONCERN:

Be it known thatl I, E. M. BATES, of East Rochester, in the county ofColumbiana, and 'State of Ohio, have invented certain new and usefulImprovements in Steam Engines; and I do hereby declare that thefollowing is a full and complete description of the construction andoperation of the same, reference being had to the accompanying drawings,making a part of this specification. in which- Figure 1 is a front viewof thecut-oif.

Figureg is a side view of thesame.

Like letters of reference refer to like parts in the views.

This apparatus consists of the yrectangular frame A, fig. 1, the inneredges of which are rabbeted ont, thusleaving a tongue or guide, B, onthc inner side. C is a cross-head, fitted to and made to slide upwardand downward upon the tongue or guide referred to. liroin thiscross-head projects upwards the shaft I), sliding through the cross-tieE, and by which it is guided and retained in a vertical position. Thisshaft is provided with an adjusting screw, F, by the means of which itand the cross-head are screwed upward and downward by the handwheel G,for a purpose hereafter shown. I is a stay supporting the screw andwheel. To the lower side of the cross-head is secured the stay J,between the arms of which is pivoted the rectangular frame K. To thisframe is fitted th'e cross-head L, which slides upward and downwardwithin the frame, as and forthe purpose hereafter described. To thiscross-head L is connected the rod M, iig. 2, which is secured in ahorizontal position by thel stay N, and through which it slidesreciprocally. O is the eccentric-rod, and is pivoted to the lower end ofthe rectangular' frame K,and by which it is operated :1s follows: Theapparatus is fixed to the engine at some con. venient point, andconnected to the eccentric by the rod O, and by which thc frame K ismadeto oseillate. The

rod M is connected to the cut-off valve, and operates the sameconjointly with the reciprocating action of the frame and rod K 0. Itwill be obvious that the reciprocating action of the valve will be inproportion to thc .vibratory action of the framcto which it isconnected, or rather the distance that the cross-head. L may be from thecentre of oscillation. Now if the head and rod operating the valve benear the centre, the stroke of the valve will be correspondinglylessened, and thus the amount of steam cnt oif will be greater than ifthe head were` more distant from that point. By this it willbe evidentthat any amount of steam may be cut off by simply changing the distance,more or leas, of the cross-head from the centre of vibration, and whichis done by screwing the frame K toward or from the'cross-head as thecase may be, by means of the screwv referred to, which is in eifect thesame as moving the head for that purpose, the head and rod M beingsecured in one position in order to adapt it to the condition ofthevalve by means of the stay N above described.

'lhe advantage resulting from the use of this apparatus is theconvenience in its application, for it is not necessary to stop theenginerin order to regulate the stroke of the valve for cutting off thesteam, as it can be done while thc engine isrunning as well as when atrest, by operating the screw in the manner above described, which in noway interferes with the general movement of the apparatus and engine. Itcan be graded to the utmost nicety, so as to' cut oi' at any point,without interfering with its regular movements, and can, if so desired,be used to cut the steam entirely off, and let it on, instead of theusual stop-valve. It is inexpensive and simple in its structure, andeasily adapted to all kinds of engines using a eut-off.

What I claim as my improvement, and desire to secure by Letters Patent,is

l. The screw I", shaft D,crosshead C, and stay J', as arranged i/ncombination with the frame A, for thc Vpurpose and inthe manner setforth. l v

2. The frame K, cross-hcads L and C, when arranged and operatedconjointly by the eccentric-rod-O, valverod'M, and adjusting screw F,for the purpose and in the manner as substantially described.

i E. M. BATES.

Witnesses:

W. H. Bonnindn, J. HOLMES.

